(x+16)*2.1=42 x-0.6x=4.888 16*5-5x=26.5 98.6-0.25x=46.3 x-2.
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(x+16)*2.1=42 x-0.6x=4.888 16*5-5x=26.5 98.6-0.25x=46.3 x-2.8+2.2=5 4.5-1.5x=1.5 8*(2x-5)=28
(x+16)*2.1=42
x+16=20
x=4
x-0.6x=4.888
0.4x=4.888
x=12.22
16*5-5x=26.5
5x=80-26.5
5x=53.5
x=10.7
98.6-0.25x=46.3
0.25x=98.6-46.3
0.25x=52.3
x=209.2
x-2.8+2.2=5
x-0.6=5
x=5.6
4.5-1.5x=1.5
1.5x=4.5-1.5
1.5x=3
x=2
8*(2x-5)=28
2x-5=3.5
2x=8.5
x=4.25
x+16=20
x=4
x-0.6x=4.888
0.4x=4.888
x=12.22
16*5-5x=26.5
5x=80-26.5
5x=53.5
x=10.7
98.6-0.25x=46.3
0.25x=98.6-46.3
0.25x=52.3
x=209.2
x-2.8+2.2=5
x-0.6=5
x=5.6
4.5-1.5x=1.5
1.5x=4.5-1.5
1.5x=3
x=2
8*(2x-5)=28
2x-5=3.5
2x=8.5
x=4.25
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
(X+X)+(X-X)+(X*X)+(X/X)=100
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x/x-4 - 32/x的平方+16=1 x+1/x + 5X/x+1=6
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
3/x-1=4/x 6/x+1=x+5/x(x+1)
2x+3x+4x+5x+x+6x+7x=100
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2